There are three major forms of business based on their legalities:

Source: monkik / Flaticon
Sole proprietorship business
A sole proprietorship business has a single owner who undertakes the job of managing and operating the business. The entity of the business and the owner are interchangeable in the eyes of the law.

Source: Eucalyp / Flaticon
Partnership form of business
When two or more people come together with a motive to carry out business and generate revenue by executing business activities, it is called a partnership form of business.

Source: Becris / Flaticon
Corporation
A corporation is a large business having multiple owners. A corporation in the eyes of the law has a separate legal entity.